Metal-drawing press.



H. G. HUNTER, DEG'D.

A. HUNTER, ADMINIMBATBIX.

METAL DRAWING PRESS. APPLIOATION FILED SEPT. 1o, 1902. BBNBWBD DBO. 1u,190s.

' 929,594. l Patented July 27, 1909.

H. C. HUNTER, DECD. A HUNTER Anmms'rumx METAL DRAWING PRESS- APrLmA'nonnun SEPT. 1o, 1902. nmnwnn D110. 1s, 190e.

Patented July 27, 1909.

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AIDREW. B GRAMMI di. FWfB-LRMNPIIERS WASKIRCHDI. B G

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HENRY C. HUNTER, OF JERSEY CITY, NEW JERSEY; AGNES HUNTER ADMINISTRATRIXOF SAID HENRY C. HUNTER, DECEASED.

METAL-DRAWING PRE S S.

Specification of Letters Patent.

Patented July 27', 1909.

Application led September 10, 1902, Serial No. 122,884. Renewed December15, 1908. Serial No. 467,688.

To all whom it may concern.'

Be it known that l, HENRY C. HUNTER, a citizen of the United States,residing at Jersey City, Hudson county, New Jersey, have inventedcertain new and useful lmprovements in Metal-Drawing Presses, of whichthe following is a specification.

The invention is particularly designed to form sheet metal heads forpacking vessels.

rlhe object of the invention is to provide a machine for embracing cutting and forming members for sheet metal so arranged that all theworking parts are convenient of access and the heavy slide orreciprocating head necessary in such machines is not suspended toreciprocate verticallybut all the p arts are so placed that they willmove without j ar and noiselessly and be compact and in such a positionthat delivery will be facilitated, and further to so arrange the formingmembers that after the operation of cutting or clipping and holding theblank' is performed, two

, line of the machine.

distinct operations of formingor drawingv will follow consecutively butwill not interfere the one with the other. lt is obvious thisarrangement may be supplied with either individual blanks of propersize, the

corners of which are to be clipped in the machine, or with blanks ofexact size not requiring any cutting. lt will be understood, however,that l do not limit myself to the use of the machine with blanksthathave been cut either to an approximate or exact size previous to'feedingthe machine as the said machine may be fed in other ways with thematerial, as for instance by feeding in strips of metal of some lengthfrom which to cut several blanks of exact size.

In the accompanying drawings:.Figure 1 is a vertical sectional view ofthe vmachine from front to rear with some of the parts in elevationtaken substantially on the central Fig. 2 is a plan view partly insection. Figs. 3, 4 and 5 are detail views showing different steps inthe drawing operation. Fig. 6 is a detail side elevation of means forcontrolling the operation of the kicker or discharge device. Fig. 7 is adetail sectional view relating to the registering pin. Fig. 8 is adetail view of a trigger used to control the operation of the kicker ordischarge device.

The blanks previously cut to the approximate size or exact size or 'thestrips of material from which the blanks are to be cut are fed inbetween the members of the cutting and forming means, or in other words,into the space 1 and between cutting members 2, 3. The cutting member 2is arranged so that its cutting edge will operate within the cuttingedge 5 of the member 3 to cut the blank or clip the same to the exactsize desired. The cutting member 3 is rigidly supported upon a backingor base plate 6 secured to a standard 7 which forms a part of the frameof the machine. The cutting member 2 is carried by a base plate 8secured to the face plate 9 adjustably held by screws 10 and nuts 11 toears 12 on a slide or frame 13 which is supported to reciprocatehorizontally upon the stationary frame SX of the machine.

Each time the slide moves forwardly the cutting member 2 moving withinthe cutting member 3 will out or clip the blank or strip of metal lyingvertically in the space l between these parts and the blank will now beheld between the flat face 14 of the cutting member 2 and a similar faceon a draw rim or ring 15 which is arranged within the cutting member 3and is supported by its fiange 16 connected with the base plate 6.

rlhe next operation is that of drawing the sheet metal blank to the shae desired. lVithin the draw rim or ring 15 arrange a movable pad 17forming part of a female die which pad is pressed normally forward tothe position shown in Fig. 1 by a spring 18 supported upon a sleeve 19and bearing at one end upon a collar 2O secured to said sleeve and atits other end upon a plate 21 arranged to have sliding movement on thesaid sleeve and connected by rods 22 with the pad 17, said rods passingthrough openings formed in the base plate 6. The pad has a groove 24around its edge for the formation of the flanged rim 25 on the blankwhen the punch 26 coperaties therewith. The said punch 26 is carried bya head 27 in a plunger 28 arranged to reciprocate within and be guidedby the slide 13 before mentioned. The head 27 has a stem 29 entering theplunger 28 and it is secured therein by a pin 30 and key 31. The punch26 is normally retracted within the cutting member 2 and its base plate8. lt is provided with a rim or flange 32 around its edge to coperatewith the groove in the female die of which the groove in the pad forms apart.

After the blank has been cut or clipped and is held lightly between theflat faces of the cutting member 2 and the draw rim or ring 15, thepunch 26 advances and engages the blank with its projecting fiange orrim 32 and draws the said blank around the edge 33 of the draw rim orring and within the same. The parts were in the position shown in Fig. 3just before the drawing operation began and at the moment the punchengaged the blank. The first step in the drawing operation isillustrated in- Fig. 4 and is that just described resulting from themovement of the punch within the draw ring. At this time the movable padhas receded under the pressure of the sheet metal blank as it is forcedinto the draw rim or ring 'and the said ad is now bottomed and 'firmlysupported by the face of the base platel6. The blank has now assumed adished shape, shown in Fig. 4 and the first drawing operation is at thistime entirely completed and the second drawing operation is about tobegin. This latter operation does not begin until after the firstoperation has been completed and it results from the continued forwardmovement of the male die which causes the rim or flange 32 to enter thegroove 24 of the female die and draw the flange 35 of the blank from thecondition' shown in Fig. 4 to that shown in Fig. 5. This drawing actionof the flange 35 takes place around or over the rim or flange 32 of thepunch.

In order to insure a perfect action and that the drawing effect willtake place easily on the flange 32 I slightly cut away the inner surfaceof the draw ring at 36 o )posite the point where the flange 35 of the bank lies or moves during the last drawing operation so that while thesaid flange is properly held or guided there will be practically nofrictional resistance and the said flange will be free to draw aroundthe projecting edge of the punch. The cut away part is shown exaggeratedin Figs. 3, 4 and 5.

After the drawing operation has been completed the plunger and sliderecede withdrawing the cutter 2 and the punch 26, the female pad 17resumes its normal position shown in Fig. 1 and the completed article,in this case a can head, is discharged by means of a discharge plungeror kicker 37 having a disk 38 thereon fitting normally in a recess inthe female pad. The said plunger is pressed by a spring 38 bearing atone end upon a collar 39 fixed to the plunger and at its other end uponthe shoulder 40 on the base plate 6, the said spring being inclosedwithin the sleeve 19 and the said rod passing through the said sleeve.The rod is operated positively by an arm 41 connected therewith andcarried by a rock shaft 42 supported in brackets 43 secured to thestandard 7 of the press, the said rock shaft having an arm 44 which isoperated by a trigger 45 ivoted to a rod 46 carried by a block 47 helfdon a rod 48 slidably supported in bearings 49 and reciprocated from aneccentric 50 on the main cam shaft 51 of the machine through aneccentric strap 52 and rod 53 which is pivotally connected with a block54 fixed to the said slide rod 48. The trigger is held in normalposition by a spring 55 so that as the slide rod moves toward the leftin Fig. 6 the trigger will yield as it strikes the arm 44 and the rockshaft and kicker will therefore remain at rest but when the slide rodmoves in the opposite direction the trigger will cause the kicker to beoperated to push the completed can head from the female pad and the drawring into the open space 1.

The plunger 28 which carries the punch is reciprocated by a crank 55forming part of the shaft 51 which is journaled in bearings 56 on themain frame. This crank 55 is connected with the plunger by a pitman 57which is adjusted as at 58 to accurately adjust the position of thestroke of the punch. The slide 13 carrying the cutting member isoperated from cams 59 on the shaft 51, which cams engage rollers 60, oneon each side of each cam, the said rollers being journaled on pins 61 inthe rearwardly extending arms 62 on the slide 13.

The bearings 56 for the cam shafts 51 are arranged in standards 7forming p'art of the main frame and these standards 7 and 7 areconnected by tie rods 7 extending from end to end of the machine andheld in place by nuts 63. As will be seen from Fig. 1 the reciprocatingparts of the machine including the cutting and punch members and theslide and plunger therefor reciprocate horizontally instead ofvertically.

In machines of this character the parts carrying the cutting and punchmembers are usually massive and when arranged to reciprocate verticallyor at an inclination considerable jar and noise result from the actionof the parts but with the horizontal arrangement herein disclosed themachine operates without jar and it is practically noiseless. This jaris a greater disadvantage than the noise it creates because it resultsfrom the taking up of all lost motion in the suspended parts beforesufficient power can be delivered to cut the blank, thus practicallyretarding the progress and causing an uneven and an unmechanical action.When the horizontal arrangement is used the lost motion is taken upfirst. Further by this arrangement the feeding in and delivery of theblanks is facilitated as both the feeding and discharge actions may takeplace in vcrtical planes immediately from between the cutting and punchmembers and may be assisted by an air blast.

Referring now to the means for feeding and properly registering orpositioning the blanks it will be seen that I employ a hopper 64arranged so that its discharge spout 65 will deliver the blanksvertically or on edge into the space 1.

The exact point in the operation of the machine at which the blank isallowed to pass from the hopper into the space 1 is determined by a rod66 having its end arranged to extend across the discharge spout oi'l thehopper, the said rod being supported adjustably by a screw 67 in a post68 extending down through a slot or opening 69 in the slide 13 andsecured to the plunger 28 of' the punch as illustrated in Fig. 1. As theplunger retracts the rod 66 is withdrawn from across the discharge chuteof lthe hopper and the sheet metal blank is allowed to fall into thespace 1.

position ol' the blank vertically in respect to the cutting and punchmembers, the said pin or pins normally extending across the space 1. Itis pressed normally outwardly by a spring 70, Fig. 7, arranged in arecess 71 of' the base plate 6 and at its outer end it bears upon thecutter 2. It holds the blank in proper position between the cutting andpunch members and when these come together it is pressed back by thecutter rim 2 so that it will not obstruct the vertical opening 1 whenthe punch and cutter recede for the discharge oi the can head. Thisregistering pin is held in its retracted position by a latch which mayconsist of a rod 72 journaled in the base plate 6 and having a latchpoint 73 to engage a groove 74 in the registering pin when this isretracted. This holds the registering pin back so that the can head canbe discharged and after this takes place the latch is released from theregistering pin by an arm 75 on the slide rod 48 which is adapted toengage an arm 76 connected with the latch rod 72.

The latch. rod is weighted by the arm 76 so that its point tends tostand upright and this latch point will automatically engage the groove74 oi' the registering rod when the same is thrust back. The arm 75 isadjustably held on the rod 48 and is set so that the release ot' theregistering pin takes place about the time the feed controlling rod 66retracts i'ar enough to allow the blank to be discharged from the hopperspout or chute 65. The proper action of these parts in relation to eachother may be accurately determined by adjustment, it being onlynecessary that the blank falling through the space 1 be caught and heldby the registering pin 69. In addition to this pin the blank isregistered in proper position by two or more pins 77 projecting from thebase plate 8 across the space 1. These pins serve to engage the lateraledges o1 the blank and hold the same properly registered. The blank mayfall into position slightly out of register but by reason of the taperedform of side pin it will be properly centered-between the punch and die.

It is arrested in this falling move-` ment by a pin or pins 69 whichregisters the- When square individual blanks are used the hopper isextended low enough to slightly engage the upper corners of the blankthus making it an element of the registering device when rectangularindividual blanks are used. l/Vhen, however, blanks of 'nished or exactsize are used with rounded corners the hopper' is eliminated as a partof the registering device and additional side pins are added to preventthe blank falling diagonally. 7 5

Air may be blown in through pipe 65X to facilitate the inward feeding ofthe blanks and blow away clippings.

I claim as my invention-:-

1. In combination, a pair of cutters, a pair of `dies operating withinthe cutters, a draw rim interposed-between one of the cutters and one ofthe dies whichlatter has a groove-d edge adjacent the draw rim andmeansfor operating the movable cutter and die mem bers, substantially asdescribed.

2. In combination, a pair of cutters, a pair of dies, a draw rimcoperating with the dies and means for' operating the movable cutter anddie members, one of the dies having a grooved edge substantially asdescribed.

3. In combination, a pair of cutters, a draw rim independent of thecutters arranged within one ofthe cutters and arranged to cooperate withthe face of the other cutter, for holding the blank and a pair of diesoperating within the cutters and means for operating the movable die andcutter members, substantially as described.

4. In combination, a female die having a groove around its edge, a maledie having a projecting edge and a draw rim within which the die membersoperate, the space between the lateral face of the projecting edge ofthe male die and the contiguous inner face of the draw rim beingslightly enlarged to enable the flange of the blank to be drawn aroundthe said projecting edge, substantially as described.

5. In combination, a draw rim, means co- 110 operating with the draw rimto confine the edge ofthe blank between itself and the edge face of thedraw rim, a die within the draw rim having a groove around its edge anda die with means for operating it within the draw 115 rim said diehaving a projecting edge, substantially as described.

6. In combination With a draw rim, a die operating within the same todraw the blank over the edge of the draw rim to form a 120 flange and asecond die within the draw rim operating to draw the flange of the blankafter the first drawing operation has been completed, one of the saiddies having a grooved edge which groove is open laterally 125 and theother die having a projecting edge to enter said groove substantially asdescribed.

7. In combination, a draw rim and a pair of dies coperating therewith toeffect separate and consecutive drawing actions on the 130 blank, first,to form a flange on the blank, and then to convert said flange into aiianged rim, said rim presenting' a channel or groove on one sidesubstantially as described.

8. In combination with a draw rim, a yielding die within the same and adie cooperating with the said rim and the die first mentioned and meansfor limiting the movement of the yielding die whereby two separate andconsecutive drawing actions will be effected on the blank, substantiallyas described.

9.` In combination, the two dies, one having a rim and the other amarginal groove one of whichl is yielding and means arranged within themargin for discharging the completed articles from the yielding die,substane tially. as described.

l0. In combination, the two dies one of whichis movable and oneyielding, a reciprocating plunger carrying the movable die, a slide'rodreciprocating with said plunger, a discharge rod extending through theyielding die and connections between the said discharge rod and slidingrod whereby the discharge rod is operated, substantially as described.

l1. In combination in a draw press, the dies operating horizontally andhaving a vertical space between them for the reception of the blanks, aregistering pin at the lower part of said space upon which the blankrests, said pin being movable across said space and means forcontrolling the movement of said pin, substantially as described.

12. In combination in a draw press, the dies operating horizontally andhaving a vertical s ace between them for the reception of the blanks, aregistering pin at the lower part of said space upon which the blankrests, said pin being movable across said space and means forcontrolling the movement of said pin, said means including a latch forholding the pin retracted and means for controlling the latch to releasethe pin, substantially as described.

13. In combination with vertically disposed die members means for movingthe die members horizontally, a registering pin extending across thevertical space between the die members to sustain the blank and sideregistering pins moving with the movable die member and tapered on theirinner sides, Y

substantially as described.

In testimony whereof, I have affixed my signature in presence of twowitnesses.

hi HENRY C. Xs HUNTER.

mark Witnesses:

HENRY L. REYNOLDS, ERNEST E. MATHISON.

